Finding the Third Proportional to 8,272 and 12,818

Step by Step Solution

1. Step 1: Write the proportion equation
   8,272 : 12,818 = 12,818 : x
2. Step 2: Convert to fraction form
   8,272/12,818 = 12,818/x
3. Step 3: Cross multiply
   8,272x = 12,818 × 12,818
4. Step 4: Simplify right side
   8,272x = 164,301,124
5. Step 5: Solve for x
   x = 164,301,124/8,272
6. Step 6: Final answer
   x = 19,862.32